Combination hand tool



March 7, 1961 R. H. MAYNARD ETAL 7 7 COMBINATION HAND TOOL 2 Sheets-Sheet 1 Filed Sept. 2, 1958 M f 4 k 2 2 I Z 2 m Z 5 A 1 3 LT i 1 HM w. M B J a INVENTORS.

19/07/120 H MAY/V420.

WALTEE BELL ATTORNEYS March 7, 1961 R. H. MAYNARD ETAL 2,973,527

COMBINATION HAND TOOL 2 Sheets-Sheet 2 Filed Sept. 2, 1958 s 0 5 MML a TNL N NY P 33 wk m HE I L mm M A W m 5 E United States 2,973,527 COMBINATION HAND 'rooL Richard H. Maynard, Mountainville, and Walter Bell, Monroe, N.Y., assignors to Star Precision Devices, Inc., Mountainville, N.Y., a corporation of Delaware Filed Sept. 2, 1958, Ser. No. 758,363

3 Claims. (Cl. 7-15) This invention relates to combination hand tools and more particularly to combination hand tools which may be used to guide and drive fasteners, studs, nails and the like into wood, concrete, steel and other materials, and

-which may also be adapted to be employed as a tool single tool which may be used for these and other operations reduces the number of tools, decreases the cost for same,and lightens the weight of the kit to be carried.

It is, therefore, the main object of our invention to provide a single combination hand tool and tool holder 1 which may be used at least for the two mentioned purposes.

It is a further object of our invention to provide in a single tool a guide member having a bore designed to' receive fasteners, studs and the like, and which is also designed to receive hammer driven tools of various types, as well as screwdriver bits.

It is a further object of our invention to provide the bore of such a tool with a removable driving member or piston which may be used to drive studs and fasteners andwhich'may also'be used to dislodge or knock out tools after our combination hand too-l is used as a drill or screwdriver.

Another object is to provide a removable striker head adapted to fit over either end of the guide member so that it may be reversed when the tool is used as a stud driver or tool holder, respectively.

It is a further object of our invention to provide a grip guard handle cover for the striking head of our tool which will serve to control rotation of the tool while in use, to aid in keeping the various elements of the tool in alignment and which will also be a hand grip and guard to protect the handof the user.

.We also provide. indicating markson-the outside of the guide member, which when used in conjunction with the end of the cover, will indicate the selective position of a stud or fastener as it is being driven into the working surface.

It is another object of our invention to provide such a tool with means to hold the studs or fasteners in position prior to driving, and it is also an object of our invention to provide means in our tool to hold the drill bits securely in position for Working.

We achieve these objects as well as others which will appear in the specification hereinbelow, with our device, which is illustrated in the drawings in which:

Fig. 1 is a partial cross section of our device in position adapted to drive fasteners, studs and the like;

Fig. 2 is a cross section of our device arranged to operate as a tool holder;

. tool with the striker head and other appurtenances removed;

Fig. 6 is a cross section of the striker head 14 with grip 15 removed, in position around the guide member 10' showing flats 19 in position; and Fig. 7 is a view similar to Fig. 6 showing another form of flats 19a.

Similar numerals throughout the specification refer to similar parts of our tool throughout the several views of the drawings.

The main body portion of our tool is the guide member 10, which is made out of steel or other metal or material sufiiciently strong for the purpose of the tool. The guide member 10 has a centrally located bore 11. At one end of the bore 11, we provide a tapered counterbore 12,

,tool holder 13. While we prefer to use a tapered counterbore 12 as a stud or fastener retaining means, as will be described below, the stud may be retained in the tool -by any other usual means such as spring ball checks, spring clips or the like. In the same manner, we prefer to use a tapered tool holder 13, to hold a tool with an end taper by means of friction. However, tools may be held in our device in any other usual manner such as by a tang at the end of the tapered shank or a set .screw or other such means.

We provide a cylindrical striker head 14 adapted to fit around the guide member 10. We cover the striker head 14 with a grip-handle cover 15 having a hand guard portion 16. Elements 15 and 16 are made of rubber, plastic, metal or any other suitable material. We find it desireable to provide a resilient material for the grip 15 and guard 16 so that theymay act as a shock absorber to protect the hand of the operator. A substantial portion of the grip 15, adjacent to the guard portion 16, is bonded to a portion of the outside of the striker head 14 by means of a suitable adhesive designed to bond rubber to metal. The other portion of the grip 15 which extends beyond the striker head 14 is adapted to slide freely over'the outside of the guide member It).

In order to provide control of the rotation of the tool when in use, we construct our guide member with outer .hexagon sections 17 which correspond with inner hexagon sections 18 for that portion of the grip 15 which extends beyond the striker head 14. Thus, our grip 15 slides freely over the guide member 10 to permit easy removal and reversal of the tool and yet is provided with means to control rotation of the guide member 10.

While we show a hexagon formation 17, 18 in our preferred form of the invention, the control means may be by any other keying shape or formation which is not a perfect circle. We may also provide rotation control by means of one-or more flats or fiat portions 19 or 19a, inserted or formed inside the striker head 14 to bear against the hexagonal surfaces 18 of the guide member 10, or we may combine two or more of these means.

There is a stud driving member or piston 20 which fits slideably within the bore 11. The piston 20 is releasably secured inside the striker head 14 by means of a pin or detent 21 in the head of the striker 14 adapted to fit into an annular groove 22 at one end of the piston -.20. The detent 21 is kept in position by means of a spring wire 23 adapted to fit around an annular groove 24 on the circumference of the striker head 14. The spring wire 23 passes through an opening 25 in the head of the detent 21. The piston 20 may be releasably seand at the other end of the bore 11, we provide a taperedapnea? .means such as spring clip, ball detent, and so forth.

The driving member 20 is secured within the striker head 14 by lifting the detent 25 against the force of the spring 23 and then inserting the driving member'20.- The detent 21 is then released and forced into the annular groove 22 of the piston 20 by the. spring wire 23. The piston 20 may be removed from the striker head 14 by reversing the operation.

Our tool is used in the following manner: When it is desired to use the tool as a stud or fastener driver, the piston 20 is inserted into the striker head 14 and then the piston 20 is inserted into the bore 11 of the guide member 10 at the end having the tapered tool holder 13. A stud or fastener, such as the stud 26, is inserted into the bore 11 at the tapered counterbore 12.

The stud 26, shown, has a rigidwasher 27 secured to its shank. When the stud 26 is inserted, the washer 27 will be frictionally held in the tapered counterbore 12, so that the stud 26 will not be dislodged from the tool, by handling, prior to the stud driving operation. As was stated above, other stud retaining means may be em ployed.

The device is now in position to drive the stud 26 as shown in Figure 1 of the drawings. driven by repeated hammer blows on. the striker head 14, which drive the piston 20 until it drives the stud 26 for the desired distance into the material which is being worked. The operator of the tool can determine just how far the stud 26 has. been driven by referring to the end 28 f the grip cover 15, and its relative position with reference to indicator lines 29.

When it is desired to use the tool as a drill, such as a star drill, the striker head 14, together with the grip 15 and the piston 20 are removed from the guide member 10. Thepiston 20 is then removed from the striker needle in the manner described above. The striker head 14 and grip 15 are then slid over the reverse end of the guide member 10 and will be in position covering the tapered counterbore 12.

. A star drill 30 with a tapered shank end 31 is then inserted at the other end of the guide member 10 into the tapered tool holder 13. The device is now assembled as shown in Figure 2 of the drawings. The drill is then placed against the working surface and the operator repeatedly hammers the striking head: 14 until the desired hole is made in the surface to beworked.

In using our device as a drill as in Figure 2, it is desirable to turn thedrill 30 as the tool is'hammered. This turning is controlled by means of the hexagon formations 17 and 18 of the guide member-10 and the grip 15, respectively, or by means offiat portions 19 as described hereinabove, or otherequivalent means.

It is sometimes difiicult to remove the drill 30 after using the tool. By replacing the removable piston 20 in the striker head Maud reinserting the piston 20 and striker head 14 and tapping same, the piston 20 will be in position to force out the drill 30, thereby rendering it a simple matter to remove' it from the tool. Thus, by.

The stud 26 is then providing for a removable piston 20, we enable it to be used both as a stud driver in our toolas well as an accessory tool remover.

While we have described our invention in its preferred forms, there are other forms which it may take within the scope of the claims below and we therefore desire to be protected forall forms of the invention coming within the said claims appended hereto.

Wherefore, we claim:

1. In a combination hand tool, a tubular guide member body portion having a through bore and a hollow striker head adapted to fit in slidingengagement over either end of said guide member, said striker head having a removable piston adapted to slide within the bore in the guide member when the striker head is fitted over either end of the guide member, said guide member having means at one end of the bore to retain temporarily an article to be driven by the hand tool with one end of the said piston extending within the saidone end of the bore having the said article retaining means and means at the other end thereof to'hold an implement whenthe said piston is removed.

2. In a combination hand tool, a tubular guide member body portion having a through bore and a hollow striker head adapted to fit in sliding engagement over either end of said guide member, said striker head having a removable piston adapted to slide within the bore extending within the said one end of the bore having the said article retaining means and means at'the other end thereof to hold an-irnpletnent'whe'n' the said piston is v .rem'oved.

3. In a combination hand tool, a tubular guide member body portion having a through bore and a hollow striker head adapted to fit in sliding engagement over either end of said guide member, said striker head having a removable piston adapted to slide within the bore in the guide member when the striker head is fitted over either end-of the guide member, and a hand grip havinga portion po'sitioned around a portion of the striker head; said striker head having keying means inside thereof facing keying means on the guide member to control rotation; and said guide member having means at one end of the bore to 0 retain temporarily an article to be driven bythe hand tool and means at the other end thereof to hold an implement.

References Cited in the file of this patent 

